GB2315265A - Infra-red and ultraviolet absorbing glass containing iron - Google Patents
Infra-red and ultraviolet absorbing glass containing iron Download PDFInfo
- Publication number
- GB2315265A GB2315265A GB9614543A GB9614543A GB2315265A GB 2315265 A GB2315265 A GB 2315265A GB 9614543 A GB9614543 A GB 9614543A GB 9614543 A GB9614543 A GB 9614543A GB 2315265 A GB2315265 A GB 2315265A
- Authority
- GB
- United Kingdom
- Prior art keywords
- composition
- less
- transmission
- glass
- infra
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000011521 glass Substances 0.000 title claims abstract description 17
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000006121 base glass Substances 0.000 claims abstract description 3
- 230000005855 radiation Effects 0.000 claims abstract description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 239000005361 soda-lime glass Substances 0.000 claims description 2
- 229910010413 TiO 2 Inorganic materials 0.000 abstract 1
- 239000003086 colorant Substances 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 3
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 3
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- -1 as opposed to ferric Chemical compound 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(II,III) oxide Inorganic materials [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/078—Glass compositions containing silica with 40% to 90% silica, by weight containing an oxide of a divalent metal, e.g. an oxide of zinc
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
- C03C4/02—Compositions for glass with special properties for coloured glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
- C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
- C03C4/082—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths for infrared absorbing glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
- C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
- C03C4/085—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths for ultraviolet absorbing glass
Abstract
An infra-red and ultraviolet radiation absorbing glass composition comprising a base glass composition and a colorant portion consisting of 1.4% to 1.7% (by weight) total iron calculated as Fe 2 O 3 and up to 0.5% of CeO 2 and/or TiO 2 , the percentage of iron in the ferrous state lying within the range of 20% to 40%. The glass produced from such composition has a light transmission greater than 70%, a Direct Solar Heat Transmission of less than 46% and an ultra-violet transmission of less than 38% at a thickness of 2mm or when converted to a thickness of 2mm.
Description
THIN HIGH IRON GLASSES
The present invention relates to soda-lime silica glass compositions and, more particularly, to glass compositions which have good solar control and ultraviolet radiation absorption properties. Solar control is a term well known in the art and is used to denote glasses having good infra-red absorption properties. The glasses made from the composition are primarily, but not exclusively, intended for use as flat glasses for vehicle glazing. The present invention also relates to glazing formed from such a composition and to laminated glazing in which at least one of the laminates is formed from the composition of the present invention.
According to the present invention, there is provided a glass composition characterised in that the colourant portion consists of :
total iron 1.4% -1.7% CeO2 Up to 0.5%
TiO2 Up to 0.5%
Ferrous state 20% - 40% the total iron being measured as Fe2O3, the glass having, at thickness of 2 millimetres, the following optical properties :
Light transmission (LT) : greater than 70%
Direct Solar Heat Transmission : Less than 46%
Ultraviolet transmission : Less than 38%
A typical base glass composition to which the colourants may be added is:
SiO2 68% - 74% (by weight)
Na2O 10% - 18%
K2O 0% - 5%
MgO
CaO 4% - 14% Al203 0% - 5%
B203 0% - 5% BaO
The ferrous content of the glass, expressed as Fe2O3, is determined from the optical density of the glass at 1000no and the extinction coefficient, which latter is given in the book "Colour Generation and Control in Glass" by C. R. Bamford and published by
Elsevier in 1977. In general terms, the lower the amount of iron in the colourant portion, the higher proportion of ferrous, as opposed to ferric, iron is required to produce the necessary properties. The converse is also generally true. Moreoever, it is also generally true that the lower the amount of iron, the higher the amounts of CeO2 and TiO2 are required to produce the ultraviolet absorption properties.
The light transmission refers to the visible transmission according to the spectrum of tungsten headlights in motor vehicles which is known as "llluminant A". Direct Solar Heat
Trasmission (DSHT) is the direct solar heat transmitted at Air Mass 2 (simulating rays from the sun striking an object at an angle of 300) over the range 300nm to 2100nm.
The ultraviolet transmission is that transmitted over the range 300nm to 400nm according to the Parry-Moon distribution and calculated according to the rectangular rule.
If desired, the composition may additionally contain up to 10pom Cm304 for colour correction purposes. The preferred amount of Fe2O3 lies within the range of from 1.5% to 1.6%. In the most preferred embodiment, the DSHT is less than 45%. Similarly, in the most preferred embodiment, the ultraviolet transmission is less than 36%.
The invention will be further described, by way of illustration only, with reference to the following non-limitative Examples.
5 2 3 4 5 6 7 Fe2O3 1.4% 1.6% 1.60% 1.6% 1.4% 1.45% 1.65 Ferrous State 30.5% 25% 25% 25% 30% 29% 24% CeO2 0.4% 0.1% 0 0.2% 0.4% 0 0 TiO2 0.3% 0.1% trace trace 0.3 0.5 trace Co3O4 0 0 0 0 10ppm 0 0 LT 71.5% 70.0% 70.5% 70.3% 70.5% 70.0% 70.1% DSHT 44.7% 45.0% 45.0% 44.9% 44.9% 44.5% 45 Ttrv 34.0% 33% 34% 33% 34% 34.4% 33% a* -8.8 -8.3 -8.2 -8.2 -8.8 -8.3 -8.1 b* +3.3 +3.7 +3.5 ~ +3.4 +2.5 +4.3 +4.2 The glass may be made in thicknesses other than 2 millimetres. Moreover, the glass of the present invention may be combined with other materials, such as clear glass, to form a laminated structure. This may be of importance if safety or security are major considerations, or if it is desired to modify the characteristics of the glass.
Claims (9)
1. An infra-red and ultra-violet absorbing, soda-lime-silica glass composition comprising
a base glass composition and a colourant portion, characterised in that the colourant
portion consisting of :
Total iron (measured as Fe203) 1.4% - 1.7% Ce Up to 0.5%
TiO2 Up to 0.5%
Ferrous state 20% - 40%
the glass having a light transmission greater than 70%, a Direct Solar Heat
Transmission (DSHT) of less than 46% and an ultraviolet radiation transmission of
less than 38% when measured at 2 millimetres thickness or when converted to 2
millimetres thickness.
2. A composition as claimed in claim 1, wherein the composition additionally includes
up to 10pom Cm304 for colour correction purposes.
3. A composition as claimed in claim 1 or 2 wherein the Fe203 content lies within the
range of from 1.5% to 1.6%
4. A composition as claimed in any one of claims 1 to 3 wherein the percentage of iron
in the ferrous state lies within the range of 20% to 35%.
5. A composition as claimed in any preceding claim in which the DSHT is less than
45%.
6. A composition as claimed in any preceding claim in which the ultraviolet transmission
is less than 36%.
7. A composition as claimed in Claim 1 substantially as hereinbefore described with
reference to the foregoing Examples.
8. Glazing whenever produced from a composition as claimed in any one of Claims 1 to
7.
9. A laminated glazing in which at least one of the sheets of glazing has a composition
as claimed in any one of Claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9614543A GB2315265A (en) | 1996-07-11 | 1996-07-11 | Infra-red and ultraviolet absorbing glass containing iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9614543A GB2315265A (en) | 1996-07-11 | 1996-07-11 | Infra-red and ultraviolet absorbing glass containing iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9614543D0 GB9614543D0 (en) | 1996-09-04 |
| GB2315265A true GB2315265A (en) | 1998-01-28 |
Family
ID=10796713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9614543A Withdrawn GB2315265A (en) | 1996-07-11 | 1996-07-11 | Infra-red and ultraviolet absorbing glass containing iron |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2315265A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008117088A1 (en) * | 2007-03-28 | 2008-10-02 | Pilkington Group Limited | Glass composition |
| US9079794B2 (en) | 2009-12-17 | 2015-07-14 | Pilkington Group Limited | Soda lime silica glass composition |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994025407A1 (en) * | 1993-04-27 | 1994-11-10 | Libbey-Owens-Ford Co. | Glass composition |
| EP0644164A1 (en) * | 1993-09-17 | 1995-03-22 | Saint-Gobain Vitrage | Glass compositions for the production of glass panes |
| WO1996028394A1 (en) * | 1995-03-16 | 1996-09-19 | Saint-Gobain Vitrage | Glass sheets for producing glazing |
-
1996
- 1996-07-11 GB GB9614543A patent/GB2315265A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994025407A1 (en) * | 1993-04-27 | 1994-11-10 | Libbey-Owens-Ford Co. | Glass composition |
| EP0644164A1 (en) * | 1993-09-17 | 1995-03-22 | Saint-Gobain Vitrage | Glass compositions for the production of glass panes |
| WO1996028394A1 (en) * | 1995-03-16 | 1996-09-19 | Saint-Gobain Vitrage | Glass sheets for producing glazing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008117088A1 (en) * | 2007-03-28 | 2008-10-02 | Pilkington Group Limited | Glass composition |
| US8461070B2 (en) | 2007-03-28 | 2013-06-11 | Pilkington Group Limited | Glass composition |
| US9079794B2 (en) | 2009-12-17 | 2015-07-14 | Pilkington Group Limited | Soda lime silica glass composition |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9614543D0 (en) | 1996-09-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |